0185-6286 0185-6286 S0185-62862018000200060 10.22134/trace.74.2018.166 Mexico Ecuador 00 00 2018 00 00 2018 74 60 91

1996 2014 1954 2013 194 1970 2003 217-30 1991 59-76 2004 9-23 2006 37-50 2005 57-81 Ministerio del Ambiente del Ecuador 2007 2006 187-216 2000 2000 1992 2 2 178 2013 1984 2008 39-52 2008 13-7 2004 69-86 2012 17 4 4 14 2003 8 1 1 1 1997 6 3 3 379-99 2006 20 1 1 250-2 2008 17 14 14 3501-12 2002 16 4 4 909-23 2001 291 5501 5501 125-8 2004 17 6 6 17-31 1991 78 2 2 273-95 1995 22 3 3 241-9 1987 74 205-33 2006 34 12 12 2064-75 2013 1 1 1 1-10 2008 36 1 1 111-23 2006 35 317-35 2012 268 6-17 1985 35 11 11 727-34 1992 1 1 1 5-21 2005 77 77 67-82 2012 9 1 1 1-16 Ministerio del Ambiente del Ecuador 2005 Ministerio del Ambiente del Ecuador 2014